>> i've had briefings with law enforcement, as well. they don't have specific leads at this point. >> this is like a fran sick search and all we have is a bomb. >> i do think it's something is going to come out on this bomb and lead us to where it originated. the other issue we do have a lot of photos. >> greta: we have searched a saudi national. i know because he a saudi national there is a little profiling there. they tackled him and they thought she was suspect. he searched his apartment and he is not a good sign. that is not a good sign. >> that lead washed out. there are other leads. i will say that is why they are asking the public to come forward if they have any information about this. so just like you, i'm very concerned. as you see the people who were killed and injured and maimed and crippled, an eight-year-old boy. it cries out for justice. >> what is curious, secretary napolitano is saying it does not appear to be a coordinated plot. upon what does she base that. from your briefing, did you get the sense she is reaching to